| Patent Number |
Title Of Patent |
Date Issued |
| RE39076 |
Apparatus and method for controlling brushless electric motors and position encoders and indicat |
April 25, 2006 |
| A brushless direct current motor is energized by a power stage. Switches of the power stage are selectively switched by an electronic control device. In order to determine the correct commutation pattern, without using rotor position indicators such as Hall effect devices, the control |
| RE38772 |
Disk storage device having an undercut hub member |
August 9, 2005 |
| A disk memory drive includes a brushless drive outer rotor motor having an internal space and a stator with windings. The outer rotor coaxially encircles the stator and a substantially cylindrical air gap is defined between the stator and the rotor. The rotor includes permanent magnets a |
| RE38673 |
Disk storage device having a hub sealing member feature |
December 21, 2004 |
| A disk memory drive includes a brushless drive outer rotor motor having an internal space and a stator with windings. The outer rotor coaxially encircles the stator and a substantially cylindrical air gap is defined between the stator and the rotor. The rotor includes permanent magnets a |
| RE38662 |
Disk storage device having a sealed bearing tube |
November 30, 2004 |
| A disk memory drive includes a brushless drive outer rotor motor having an internal space and a stator with windings. The outer rotor coaxially encircles the stator and a substantially cylindrical air gap is defined between the stator and the rotor. The rotor includes permanent magnets a |
| RE38264 |
Rotary drive for a data carrier |
October 7, 2003 |
| A data medium is driven by a brushless direct current more, and possesses control signals en a track which can be picked up by a sensing device and supplied to a switch arrangement for activation of the motor winding. The control signals on the track characterize at least those angular p |
| RE38179 |
Disk storage device having a three-phase brushless DC underhub configured spindle motor |
July 8, 2003 |
| A disk memory drive includes a brushless drive outer rotor motor having an internal space and a stator with windings. The outer rotor coaxially encircles the stator and a substantially cylindrical air gap is defined between the stator and the rotor. The rotor includes permanent magnets a |
| RE38178 |
Disk storage device having an underhub spindle motor |
July 8, 2003 |
| A disk memory drive includes a brushless drive outer rotor motor having an internal space and a stator with windings. The outer rotor coaxially encircles the stator and a substantially cylindrical air gap is defined between the stator and the rotor. The rotor includes permanent magnets a |
| 7564154 |
Disk storage device with brushless DC drive motor and slide bearing assembly |
July 21, 2009 |
| A compact disk storage device having an outer-rotor dc-brushless electric motor for directly driving a disk for recording and reproducing information, having an axially deep, tank-form flange and a stationary shaft, upon which the mounting annulus of the flange and a bearing assembly |
| 7067998 |
Drive circuit for brushless DC motors |
June 27, 2006 |
| A drive circuit for brushless DC motors including a rotor and a stator with at least one stator coil includes a commutation device which supplies commutation pulses of drive current to the stator coil(s). The commutation device senses the rotor position and calculates current rotor s |
| 6005746 |
Disk storage device with improved spindle torque and acceleration |
December 21, 1999 |
| A disk storage device that utilizes an inner rotor spindle motor in which the spindle shaft is fixed to the disk mounting hub and rotates therewith. Support for the spindle is provided by a bearing tube that has a greater diameter and greater rigidity than the stationary shaft or post ty |
